MailSend - description from Softdepia.com:

MailSend for Microsoft Mail and MAPI MailSend sends messages from the command line or from batch files to Microsoft Mail or Exchange. Works with: Any version of MSMail, even with the postoffice edition that comes with Windows. Any complete MAPI compatible e-mail client.

MailSend is a "Free to try" program. You can download and try it for an evaluation period.